Underneath it will read "Require PIN to use phone". We are going to need the PIN number that has come with the SIM card. When we bought the phone, including the SIM card with it, it will have came with a PIN number. Make sure the PIN number is on hand before continuing.

We can tell by looking at the empty box we previously tapped on. It will now be green, with a white checkmark inside. Now, when we want to use the phone, it will ask us to insert the PIN number we have just entered.